Hi.. you wont be able to copy to /usr/bin unless the copy command is running with root level privileges. This has been done for a reason, on linux based systems. Every file on the system is tracked by a package manager, making it possible to remove and upgrade packages easily. If you put files into the filesystem that the packagemanager does not know about, you risk breaking the operating system when future package updates are released.

The correct way to install files into /usr/bin would be to package them into a deb file, and install the deb using the package manager. (gainroot, then use "dpkg -i mydebfile.deb")

Alternatively, you can make a bin directory under your home directory and install/run the binary executable there.

cd
mkdir bin
cp mybinary bin
bin/mybinary

that last command will execute the binary. This is a much safer way of playing than writing files into the OS's directories

Hope that helps